单项选择题
A.闲置能量差异和效率差异 B.闲置能量差异和耗费差异 C.耗费差异和效率差异 D.能量差异和效率差异
A.105.6,330 B.96,300 C.96,330 D.105.6,300
A.90 B.89.47 C.87.49 D.87.9